package com.lcicl.reggie.controller;

import com.lcicl.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

/*
  Date: 2023/09/08
  Author: Luochao
  Description:
            文件处理
*/
@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    /**
     * 文件上传
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) {
        log.info("上传文件...");
        String filename = file.getOriginalFilename();

        String substring = filename.substring(filename.lastIndexOf("."));

        filename = UUID.randomUUID().toString() + substring;

        File dir = new File(basePath);
        if (!dir.exists()) {    //没有该目录时创建目录
            dir.mkdirs();
        }

        try {
            file.transferTo(new File(basePath +filename));
            return R.success(filename);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }


    /**
     * 文件下载
     * @param name
     * @param response
     */
    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) {
        if (name == null) {
            return;
        }
        try {
            FileInputStream fileInputStream = new FileInputStream(new File(basePath+name));
            ServletOutputStream outputStream = response.getOutputStream();

            response.setContentType("image/jpeg");

            int len = 0;
            byte[] bytes = new byte[1024];

            //读取图片流
            while ((len=fileInputStream.read(bytes)) != -1) {
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }

            //关闭资源
            outputStream.close();
            fileInputStream.close();

        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }


    /**
     * 删除文件
     * @param fileName
     */
    public void delete(String fileName) {
        File file = new File(basePath + fileName);
        System.out.println(basePath);
        System.out.println(file.exists());
        if (file.exists() && file.isFile()) {
            file.delete();
            log.info("删除成功");
        }

    }


}
